<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片信息区域 -->
    <el-card>
      <!-- 头部提示信息 -->
      <el-alert
        title="添加商品信息"
        type="info"
        show-icon
        center
        :closable="false"
      >
      </el-alert>
      <!-- step步骤条区域 -->
      <el-steps :active="activeIndex - 0" finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tabs栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          tab-position="left"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <!-- 第一步 -->
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weihgt">
              <el-input v-model="addForm.goods_weihgt"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="categoriesList"
                :props="cascaderProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <!-- 第二步 -->
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableDate"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  :label="cb"
                  border
                >
                </el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <!-- 第三步 -->
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableDate"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <!-- 第四步 -->
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="upLoadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :headers="headerObj"
              list-type="picture"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <!-- 第五步 -->
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"> </quill-editor>
            <el-button type="primary" class="butTop" @click="add">
              添加商品
            </el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialogVisible"
      width="50%"
    >
      <img :src="previewURL" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from "lodash";

export default {
  data () {
    return {
      activeIndex: '0',
      // 表单数据和表单验证规则
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weihgt: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weihgt: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类数据列表
      categoriesList: [],
      cascaderProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      manyTableDate: [],
      onlyTableDate: [],
      upLoadURL: "http://127.0.0.1:8888/api/private/v1/upload",
      // 图片上传组件的请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewDialogVisible: false,
      previewURL: ''
    }
  },
  created () {
    this.getCategoriesList()
  },
  methods: {
    // 获取商品分类数据列表
    async getCategoriesList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('请求商品分类数据列表失败')
      }
      this.$message.success('请求商品分类数据列表成功')
      this.categoriesList = res.data
    },
    handleChange () {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave (activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    // 点击切换tab栏事件
    tabClicked () {
      if (this.activeIndex === "1") { this.getManylist() }
      else if (this.activeIndex === "2") { this.getOnlylist() }
    },
    // 获取商品动态参数数据
    async getManylist () {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: "many" } })
      if (res.meta.status !== 200) {
        return this.$message.error('请求商品分类数据列表失败')
      }
      this.$message.success('请求商品分类数据列表成功')
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
      });
      this.manyTableDate = res.data
      // console.log(this.manyTableDate)
    },
    // 获取商品静态属性数据
    async getOnlylist () {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: "only" } })
      if (res.meta.status !== 200) {
        return this.$message.error('请求商品分类数据列表失败')
      }
      this.$message.success('请求商品分类数据列表成功')
      // res.data.forEach(item => {
      //   item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
      // })
      this.onlyTableDate = res.data
      // console.log(this.onlyTableDate)
    },
    // 删除图片事件
    handleRemove (file) {
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(x => { x.pic === filePath })
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    handleSuccess (response) {
      // 拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 将图片信息对象 push 到 pics 数组中
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm)
    },
    // 点击加载好的图片触发预览事件
    handlePreview (file) {
      this.previewURL = file.response.data.url
      this.previewDialogVisible = true
    },
    async add () {
      this.$refs.addFormRef.validate(valid => {
        if (!valid) return this.$message.error('请添加必要的商品数据')
      })

      // 处理动态属性数据
      this.manyTableDate.forEach(item => {
        const newInfo = {
          attr_id: item.attr_id,
          attr_value: item.attr_vals.join(' ')
        }
        this.addForm.attrs.push(newInfo)
      })
      // 处理静态参数数据
      this.onlyTableDate.forEach(item => {
        const newInfo = {
          attr_id: item.attr_id,
          attr_value: item.attr_vals
        }
        this.addForm.attrs.push(newInfo)
      })
      // 深拷贝
      const form = _.cloneDeep(this.addForm)
      form.goods_cat = form.goods_cat.join(',')

      const { data: res } = await this.$http.post('goods', form)
      if (res.meta.status !== 201) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success('添加成功')
      this.$router.push('/goods')
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-steps {
  margin: 18px 80px;
}
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.butTop {
  margin-top: 15px;
}
</style>